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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.configuration;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.io.ByteArrayOutputStream;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.PrintStream;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.util.ArrayList;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.util.Collection;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.util.HashMap;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.util.Iterator;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.util.List;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.util.Map;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.util.Set;<a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.commons.configuration.event.ConfigurationEvent;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.apache.commons.configuration.event.ConfigurationListener;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.apache.commons.configuration.tree.ConfigurationNode;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.commons.configuration.tree.DefaultConfigurationKey;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.commons.configuration.tree.DefaultConfigurationNode;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.apache.commons.configuration.tree.DefaultExpressionEngine;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.apache.commons.configuration.tree.ExpressionEngine;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.apache.commons.configuration.tree.NodeCombiner;<a name="line.36"></a>
<FONT color="green">037</FONT>    import org.apache.commons.configuration.tree.TreeUtils;<a name="line.37"></a>
<FONT color="green">038</FONT>    import org.apache.commons.configuration.tree.UnionCombiner;<a name="line.38"></a>
<FONT color="green">039</FONT>    import org.apache.commons.configuration.tree.ViewNode;<a name="line.39"></a>
<FONT color="green">040</FONT>    <a name="line.40"></a>
<FONT color="green">041</FONT>    /**<a name="line.41"></a>
<FONT color="green">042</FONT>     * &lt;p&gt;<a name="line.42"></a>
<FONT color="green">043</FONT>     * A hierarchical composite configuration class.<a name="line.43"></a>
<FONT color="green">044</FONT>     * &lt;/p&gt;<a name="line.44"></a>
<FONT color="green">045</FONT>     * &lt;p&gt;<a name="line.45"></a>
<FONT color="green">046</FONT>     * This class maintains a list of configuration objects, which can be added<a name="line.46"></a>
<FONT color="green">047</FONT>     * using the divers {@code addConfiguration()} methods. After that the<a name="line.47"></a>
<FONT color="green">048</FONT>     * configurations can be accessed either by name (if one was provided when the<a name="line.48"></a>
<FONT color="green">049</FONT>     * configuration was added) or by index. For the whole set of managed<a name="line.49"></a>
<FONT color="green">050</FONT>     * configurations a logical node structure is constructed. For this purpose a<a name="line.50"></a>
<FONT color="green">051</FONT>     * {@link org.apache.commons.configuration.tree.NodeCombiner NodeCombiner}<a name="line.51"></a>
<FONT color="green">052</FONT>     * object can be set. This makes it possible to specify different algorithms for<a name="line.52"></a>
<FONT color="green">053</FONT>     * the combination process.<a name="line.53"></a>
<FONT color="green">054</FONT>     * &lt;/p&gt;<a name="line.54"></a>
<FONT color="green">055</FONT>     * &lt;p&gt;<a name="line.55"></a>
<FONT color="green">056</FONT>     * The big advantage of this class is that it creates a truly hierarchical<a name="line.56"></a>
<FONT color="green">057</FONT>     * structure of all the properties stored in the contained configurations - even<a name="line.57"></a>
<FONT color="green">058</FONT>     * if some of them are no hierarchical configurations per se. So all enhanced<a name="line.58"></a>
<FONT color="green">059</FONT>     * features provided by a hierarchical configuration (e.g. choosing an<a name="line.59"></a>
<FONT color="green">060</FONT>     * expression engine) are applicable.<a name="line.60"></a>
<FONT color="green">061</FONT>     * &lt;/p&gt;<a name="line.61"></a>
<FONT color="green">062</FONT>     * &lt;p&gt;<a name="line.62"></a>
<FONT color="green">063</FONT>     * The class works by registering itself as an event listener at all added<a name="line.63"></a>
<FONT color="green">064</FONT>     * configurations. So it gets notified whenever one of these configurations is<a name="line.64"></a>
<FONT color="green">065</FONT>     * changed and can invalidate its internal node structure. The next time a<a name="line.65"></a>
<FONT color="green">066</FONT>     * property is accessed the node structure will be re-constructed using the<a name="line.66"></a>
<FONT color="green">067</FONT>     * current state of the managed configurations. Note that, depending on the used<a name="line.67"></a>
<FONT color="green">068</FONT>     * {@code NodeCombiner}, this may be a complex operation.<a name="line.68"></a>
<FONT color="green">069</FONT>     * &lt;/p&gt;<a name="line.69"></a>
<FONT color="green">070</FONT>     * &lt;p&gt;<a name="line.70"></a>
<FONT color="green">071</FONT>     * Because of the way a {@code CombinedConfiguration} is working it has<a name="line.71"></a>
<FONT color="green">072</FONT>     * more or less view character: it provides a logic view on the configurations<a name="line.72"></a>
<FONT color="green">073</FONT>     * it contains. In this constellation not all methods defined for hierarchical<a name="line.73"></a>
<FONT color="green">074</FONT>     * configurations - especially methods that update the stored properties - can<a name="line.74"></a>
<FONT color="green">075</FONT>     * be implemented in a consistent manner. Using such methods (like<a name="line.75"></a>
<FONT color="green">076</FONT>     * {@code addProperty()}, or {@code clearProperty()} on a<a name="line.76"></a>
<FONT color="green">077</FONT>     * {@code CombinedConfiguration} is not strictly forbidden, however,<a name="line.77"></a>
<FONT color="green">078</FONT>     * depending on the current {@link NodeCombiner} and the involved<a name="line.78"></a>
<FONT color="green">079</FONT>     * properties, the results may be different than expected. Some examples may<a name="line.79"></a>
<FONT color="green">080</FONT>     * illustrate this:<a name="line.80"></a>
<FONT color="green">081</FONT>     * &lt;/p&gt;<a name="line.81"></a>
<FONT color="green">082</FONT>     * &lt;p&gt;<a name="line.82"></a>
<FONT color="green">083</FONT>     * &lt;ul&gt;<a name="line.83"></a>
<FONT color="green">084</FONT>     * &lt;li&gt;Imagine a {@code CombinedConfiguration} &lt;em&gt;cc&lt;/em&gt; containing<a name="line.84"></a>
<FONT color="green">085</FONT>     * two child configurations with the following content:<a name="line.85"></a>
<FONT color="green">086</FONT>     * &lt;dl&gt;<a name="line.86"></a>
<FONT color="green">087</FONT>     * &lt;dt&gt;user.properties&lt;/dt&gt;<a name="line.87"></a>
<FONT color="green">088</FONT>     * &lt;dd&gt;<a name="line.88"></a>
<FONT color="green">089</FONT>     *<a name="line.89"></a>
<FONT color="green">090</FONT>     * &lt;pre&gt;<a name="line.90"></a>
<FONT color="green">091</FONT>     * gui.background = blue<a name="line.91"></a>
<FONT color="green">092</FONT>     * gui.position = (10, 10, 400, 200)<a name="line.92"></a>
<FONT color="green">093</FONT>     * &lt;/pre&gt;<a name="line.93"></a>
<FONT color="green">094</FONT>     *<a name="line.94"></a>
<FONT color="green">095</FONT>     * &lt;/dd&gt;<a name="line.95"></a>
<FONT color="green">096</FONT>     * &lt;dt&gt;default.properties&lt;/dt&gt;<a name="line.96"></a>
<FONT color="green">097</FONT>     * &lt;dd&gt;<a name="line.97"></a>
<FONT color="green">098</FONT>     *<a name="line.98"></a>
<FONT color="green">099</FONT>     * &lt;pre&gt;<a name="line.99"></a>
<FONT color="green">100</FONT>     * gui.background = black<a name="line.100"></a>
<FONT color="green">101</FONT>     * gui.foreground = white<a name="line.101"></a>
<FONT color="green">102</FONT>     * home.dir = /data<a name="line.102"></a>
<FONT color="green">103</FONT>     * &lt;/pre&gt;<a name="line.103"></a>
<FONT color="green">104</FONT>     *<a name="line.104"></a>
<FONT color="green">105</FONT>     * &lt;/dd&gt;<a name="line.105"></a>
<FONT color="green">106</FONT>     * &lt;/dl&gt;<a name="line.106"></a>
<FONT color="green">107</FONT>     * As a {@code NodeCombiner} a<a name="line.107"></a>
<FONT color="green">108</FONT>     * {@link org.apache.commons.configuration.tree.OverrideCombiner OverrideCombiner}<a name="line.108"></a>
<FONT color="green">109</FONT>     * is used. This combiner will ensure that defined user settings take precedence<a name="line.109"></a>
<FONT color="green">110</FONT>     * over the default values. If the resulting {@code CombinedConfiguration}<a name="line.110"></a>
<FONT color="green">111</FONT>     * is queried for the background color, {@code blue} will be returned<a name="line.111"></a>
<FONT color="green">112</FONT>     * because this value is defined in {@code user.properties}. Now<a name="line.112"></a>
<FONT color="green">113</FONT>     * consider what happens if the key {@code gui.background} is removed<a name="line.113"></a>
<FONT color="green">114</FONT>     * from the {@code CombinedConfiguration}:<a name="line.114"></a>
<FONT color="green">115</FONT>     *<a name="line.115"></a>
<FONT color="green">116</FONT>     * &lt;pre&gt;cc.clearProperty("gui.background");&lt;/pre&gt;<a name="line.116"></a>
<FONT color="green">117</FONT>     *<a name="line.117"></a>
<FONT color="green">118</FONT>     * Will a {@code cc.containsKey("gui.background")} now return &lt;b&gt;false&lt;/b&gt;?<a name="line.118"></a>
<FONT color="green">119</FONT>     * No, it won't! The {@code clearProperty()} operation is executed on the<a name="line.119"></a>
<FONT color="green">120</FONT>     * node set of the combined configuration, which was constructed from the nodes<a name="line.120"></a>
<FONT color="green">121</FONT>     * of the two child configurations. It causes the value of the<a name="line.121"></a>
<FONT color="green">122</FONT>     * &lt;em&gt;background&lt;/em&gt; node to be cleared, which is also part of the first<a name="line.122"></a>
<FONT color="green">123</FONT>     * child configuration. This modification of one of its child configurations<a name="line.123"></a>
<FONT color="green">124</FONT>     * causes the {@code CombinedConfiguration} to be re-constructed. This<a name="line.124"></a>
<FONT color="green">125</FONT>     * time the {@code OverrideCombiner} cannot find a<a name="line.125"></a>
<FONT color="green">126</FONT>     * {@code gui.background} property in the first child configuration, but<a name="line.126"></a>
<FONT color="green">127</FONT>     * it finds one in the second, and adds it to the resulting combined<a name="line.127"></a>
<FONT color="green">128</FONT>     * configuration. So the property is still present (with a different value now).&lt;/li&gt;<a name="line.128"></a>
<FONT color="green">129</FONT>     * &lt;li&gt;{@code addProperty()} can also be problematic: Most node<a name="line.129"></a>
<FONT color="green">130</FONT>     * combiners use special view nodes for linking parts of the original<a name="line.130"></a>
<FONT color="green">131</FONT>     * configurations' data together. If new properties are added to such a special<a name="line.131"></a>
<FONT color="green">132</FONT>     * node, they do not belong to any of the managed configurations and thus hang<a name="line.132"></a>
<FONT color="green">133</FONT>     * in the air. Using the same configurations as in the last example, the<a name="line.133"></a>
<FONT color="green">134</FONT>     * statement<a name="line.134"></a>
<FONT color="green">135</FONT>     *<a name="line.135"></a>
<FONT color="green">136</FONT>     * &lt;pre&gt;<a name="line.136"></a>
<FONT color="green">137</FONT>     * addProperty("database.user", "scott");<a name="line.137"></a>
<FONT color="green">138</FONT>     * &lt;/pre&gt;<a name="line.138"></a>
<FONT color="green">139</FONT>     *<a name="line.139"></a>
<FONT color="green">140</FONT>     * would cause such a hanging property. If now one of the child configurations<a name="line.140"></a>
<FONT color="green">141</FONT>     * is changed and the {@code CombinedConfiguration} is re-constructed,<a name="line.141"></a>
<FONT color="green">142</FONT>     * this property will disappear! (Add operations are not problematic if they<a name="line.142"></a>
<FONT color="green">143</FONT>     * result in a child configuration being updated. For instance an<a name="line.143"></a>
<FONT color="green">144</FONT>     * {@code addProperty("home.url", "localhost");} will alter the second<a name="line.144"></a>
<FONT color="green">145</FONT>     * child configuration - because the prefix &lt;em&gt;home&lt;/em&gt; is here already<a name="line.145"></a>
<FONT color="green">146</FONT>     * present; when the {@code CombinedConfiguration} is re-constructed,<a name="line.146"></a>
<FONT color="green">147</FONT>     * this change is taken into account.)&lt;/li&gt;<a name="line.147"></a>
<FONT color="green">148</FONT>     * &lt;/ul&gt;<a name="line.148"></a>
<FONT color="green">149</FONT>     * Because of such problems it is recommended to perform updates only on the<a name="line.149"></a>
<FONT color="green">150</FONT>     * managed child configurations.<a name="line.150"></a>
<FONT color="green">151</FONT>     * &lt;/p&gt;<a name="line.151"></a>
<FONT color="green">152</FONT>     * &lt;p&gt;<a name="line.152"></a>
<FONT color="green">153</FONT>     * Whenever the node structure of a {@code CombinedConfiguration} becomes<a name="line.153"></a>
<FONT color="green">154</FONT>     * invalid (either because one of the contained configurations was modified or<a name="line.154"></a>
<FONT color="green">155</FONT>     * because the {@code invalidate()} method was directly called) an event<a name="line.155"></a>
<FONT color="green">156</FONT>     * is generated. So this can be detected by interested event listeners. This<a name="line.156"></a>
<FONT color="green">157</FONT>     * also makes it possible to add a combined configuration into another one.<a name="line.157"></a>
<FONT color="green">158</FONT>     * &lt;/p&gt;<a name="line.158"></a>
<FONT color="green">159</FONT>     * &lt;p&gt;<a name="line.159"></a>
<FONT color="green">160</FONT>     * Implementation note: Adding and removing configurations to and from a<a name="line.160"></a>
<FONT color="green">161</FONT>     * combined configuration is not thread-safe. If a combined configuration is<a name="line.161"></a>
<FONT color="green">162</FONT>     * manipulated by multiple threads, the developer has to take care about<a name="line.162"></a>
<FONT color="green">163</FONT>     * properly synchronization.<a name="line.163"></a>
<FONT color="green">164</FONT>     * &lt;/p&gt;<a name="line.164"></a>
<FONT color="green">165</FONT>     *<a name="line.165"></a>
<FONT color="green">166</FONT>     * @author &lt;a<a name="line.166"></a>
<FONT color="green">167</FONT>     * href="http://commons.apache.org/configuration/team-list.html"&gt;Commons<a name="line.167"></a>
<FONT color="green">168</FONT>     * Configuration team&lt;/a&gt;<a name="line.168"></a>
<FONT color="green">169</FONT>     * @since 1.3<a name="line.169"></a>
<FONT color="green">170</FONT>     * @version $Id: CombinedConfiguration.java 1234985 2012-01-23 21:09:09Z oheger $<a name="line.170"></a>
<FONT color="green">171</FONT>     */<a name="line.171"></a>
<FONT color="green">172</FONT>    public class CombinedConfiguration extends HierarchicalReloadableConfiguration implements<a name="line.172"></a>
<FONT color="green">173</FONT>            ConfigurationListener, Cloneable<a name="line.173"></a>
<FONT color="green">174</FONT>    {<a name="line.174"></a>
<FONT color="green">175</FONT>        /**<a name="line.175"></a>
<FONT color="green">176</FONT>         * Constant for the invalidate event that is fired when the internal node<a name="line.176"></a>
<FONT color="green">177</FONT>         * structure becomes invalid.<a name="line.177"></a>
<FONT color="green">178</FONT>         */<a name="line.178"></a>
<FONT color="green">179</FONT>        public static final int EVENT_COMBINED_INVALIDATE = 40;<a name="line.179"></a>
<FONT color="green">180</FONT>    <a name="line.180"></a>
<FONT color="green">181</FONT>        /**<a name="line.181"></a>
<FONT color="green">182</FONT>         * The serial version ID.<a name="line.182"></a>
<FONT color="green">183</FONT>         */<a name="line.183"></a>
<FONT color="green">184</FONT>        private static final long serialVersionUID = 8338574525528692307L;<a name="line.184"></a>
<FONT color="green">185</FONT>    <a name="line.185"></a>
<FONT color="green">186</FONT>        /** Constant for the expression engine for parsing the at path. */<a name="line.186"></a>
<FONT color="green">187</FONT>        private static final DefaultExpressionEngine AT_ENGINE = new DefaultExpressionEngine();<a name="line.187"></a>
<FONT color="green">188</FONT>    <a name="line.188"></a>
<FONT color="green">189</FONT>        /** Constant for the default node combiner. */<a name="line.189"></a>
<FONT color="green">190</FONT>        private static final NodeCombiner DEFAULT_COMBINER = new UnionCombiner();<a name="line.190"></a>
<FONT color="green">191</FONT>    <a name="line.191"></a>
<FONT color="green">192</FONT>        /** Constant for the name of the property used for the reload check.*/<a name="line.192"></a>
<FONT color="green">193</FONT>        private static final String PROP_RELOAD_CHECK = "CombinedConfigurationReloadCheck";<a name="line.193"></a>
<FONT color="green">194</FONT>    <a name="line.194"></a>
<FONT color="green">195</FONT>        /** Stores the combiner. */<a name="line.195"></a>
<FONT color="green">196</FONT>        private NodeCombiner nodeCombiner;<a name="line.196"></a>
<FONT color="green">197</FONT>    <a name="line.197"></a>
<FONT color="green">198</FONT>        /** Stores the combined root node. */<a name="line.198"></a>
<FONT color="green">199</FONT>        private volatile ConfigurationNode combinedRoot;<a name="line.199"></a>
<FONT color="green">200</FONT>    <a name="line.200"></a>
<FONT color="green">201</FONT>        /** Stores a list with the contained configurations. */<a name="line.201"></a>
<FONT color="green">202</FONT>        private List&lt;ConfigData&gt; configurations;<a name="line.202"></a>
<FONT color="green">203</FONT>    <a name="line.203"></a>
<FONT color="green">204</FONT>        /** Stores a map with the named configurations. */<a name="line.204"></a>
<FONT color="green">205</FONT>        private Map&lt;String, AbstractConfiguration&gt; namedConfigurations;<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>        /** The default behavior is to ignore exceptions that occur during reload */<a name="line.207"></a>
<FONT color="green">208</FONT>        private boolean ignoreReloadExceptions = true;<a name="line.208"></a>
<FONT color="green">209</FONT>    <a name="line.209"></a>
<FONT color="green">210</FONT>        /** Set to true when the backing file has changed */<a name="line.210"></a>
<FONT color="green">211</FONT>        private boolean reloadRequired;<a name="line.211"></a>
<FONT color="green">212</FONT>    <a name="line.212"></a>
<FONT color="green">213</FONT>        /**<a name="line.213"></a>
<FONT color="green">214</FONT>         * An expression engine used for converting child configurations to<a name="line.214"></a>
<FONT color="green">215</FONT>         * hierarchical ones.<a name="line.215"></a>
<FONT color="green">216</FONT>         */<a name="line.216"></a>
<FONT color="green">217</FONT>        private ExpressionEngine conversionExpressionEngine;<a name="line.217"></a>
<FONT color="green">218</FONT>    <a name="line.218"></a>
<FONT color="green">219</FONT>        /** A flag whether an enhanced reload check is to be performed.*/<a name="line.219"></a>
<FONT color="green">220</FONT>        private boolean forceReloadCheck;<a name="line.220"></a>
<FONT color="green">221</FONT>    <a name="line.221"></a>
<FONT color="green">222</FONT>        /**<a name="line.222"></a>
<FONT color="green">223</FONT>         * Creates a new instance of {@code CombinedConfiguration} and<a name="line.223"></a>
<FONT color="green">224</FONT>         * initializes the combiner to be used.<a name="line.224"></a>
<FONT color="green">225</FONT>         *<a name="line.225"></a>
<FONT color="green">226</FONT>         * @param comb the node combiner (can be &lt;b&gt;null&lt;/b&gt;, then a union combiner<a name="line.226"></a>
<FONT color="green">227</FONT>         * is used as default)<a name="line.227"></a>
<FONT color="green">228</FONT>         */<a name="line.228"></a>
<FONT color="green">229</FONT>        public CombinedConfiguration(NodeCombiner comb)<a name="line.229"></a>
<FONT color="green">230</FONT>        {<a name="line.230"></a>
<FONT color="green">231</FONT>            setNodeCombiner((comb != null) ? comb : DEFAULT_COMBINER);<a name="line.231"></a>
<FONT color="green">232</FONT>            clear();<a name="line.232"></a>
<FONT color="green">233</FONT>        }<a name="line.233"></a>
<FONT color="green">234</FONT>    <a name="line.234"></a>
<FONT color="green">235</FONT>        public CombinedConfiguration(NodeCombiner comb, Lock lock)<a name="line.235"></a>
<FONT color="green">236</FONT>        {<a name="line.236"></a>
<FONT color="green">237</FONT>            super(lock);<a name="line.237"></a>
<FONT color="green">238</FONT>            setNodeCombiner((comb != null) ? comb : DEFAULT_COMBINER);<a name="line.238"></a>
<FONT color="green">239</FONT>            clear();<a name="line.239"></a>
<FONT color="green">240</FONT>        }<a name="line.240"></a>
<FONT color="green">241</FONT>    <a name="line.241"></a>
<FONT color="green">242</FONT>        public CombinedConfiguration(Lock lock)<a name="line.242"></a>
<FONT color="green">243</FONT>        {<a name="line.243"></a>
<FONT color="green">244</FONT>            this(null, lock);<a name="line.244"></a>
<FONT color="green">245</FONT>        }<a name="line.245"></a>
<FONT color="green">246</FONT>    <a name="line.246"></a>
<FONT color="green">247</FONT>        /**<a name="line.247"></a>
<FONT color="green">248</FONT>         * Creates a new instance of {@code CombinedConfiguration} that uses<a name="line.248"></a>
<FONT color="green">249</FONT>         * a union combiner.<a name="line.249"></a>
<FONT color="green">250</FONT>         *<a name="line.250"></a>
<FONT color="green">251</FONT>         * @see org.apache.commons.configuration.tree.UnionCombiner<a name="line.251"></a>
<FONT color="green">252</FONT>         */<a name="line.252"></a>
<FONT color="green">253</FONT>        public CombinedConfiguration()<a name="line.253"></a>
<FONT color="green">254</FONT>        {<a name="line.254"></a>
<FONT color="green">255</FONT>            this(null, null);<a name="line.255"></a>
<FONT color="green">256</FONT>        }<a name="line.256"></a>
<FONT color="green">257</FONT>    <a name="line.257"></a>
<FONT color="green">258</FONT>        /**<a name="line.258"></a>
<FONT color="green">259</FONT>         * Returns the node combiner that is used for creating the combined node<a name="line.259"></a>
<FONT color="green">260</FONT>         * structure.<a name="line.260"></a>
<FONT color="green">261</FONT>         *<a name="line.261"></a>
<FONT color="green">262</FONT>         * @return the node combiner<a name="line.262"></a>
<FONT color="green">263</FONT>         */<a name="line.263"></a>
<FONT color="green">264</FONT>        public NodeCombiner getNodeCombiner()<a name="line.264"></a>
<FONT color="green">265</FONT>        {<a name="line.265"></a>
<FONT color="green">266</FONT>            return nodeCombiner;<a name="line.266"></a>
<FONT color="green">267</FONT>        }<a name="line.267"></a>
<FONT color="green">268</FONT>    <a name="line.268"></a>
<FONT color="green">269</FONT>        /**<a name="line.269"></a>
<FONT color="green">270</FONT>         * Sets the node combiner. This object will be used when the combined node<a name="line.270"></a>
<FONT color="green">271</FONT>         * structure is to be constructed. It must not be &lt;b&gt;null&lt;/b&gt;, otherwise an<a name="line.271"></a>
<FONT color="green">272</FONT>         * {@code IllegalArgumentException} exception is thrown. Changing the<a name="line.272"></a>
<FONT color="green">273</FONT>         * node combiner causes an invalidation of this combined configuration, so<a name="line.273"></a>
<FONT color="green">274</FONT>         * that the new combiner immediately takes effect.<a name="line.274"></a>
<FONT color="green">275</FONT>         *<a name="line.275"></a>
<FONT color="green">276</FONT>         * @param nodeCombiner the node combiner<a name="line.276"></a>
<FONT color="green">277</FONT>         */<a name="line.277"></a>
<FONT color="green">278</FONT>        public void setNodeCombiner(NodeCombiner nodeCombiner)<a name="line.278"></a>
<FONT color="green">279</FONT>        {<a name="line.279"></a>
<FONT color="green">280</FONT>            if (nodeCombiner == null)<a name="line.280"></a>
<FONT color="green">281</FONT>            {<a name="line.281"></a>
<FONT color="green">282</FONT>                throw new IllegalArgumentException(<a name="line.282"></a>
<FONT color="green">283</FONT>                        "Node combiner must not be null!");<a name="line.283"></a>
<FONT color="green">284</FONT>            }<a name="line.284"></a>
<FONT color="green">285</FONT>            this.nodeCombiner = nodeCombiner;<a name="line.285"></a>
<FONT color="green">286</FONT>            invalidate();<a name="line.286"></a>
<FONT color="green">287</FONT>        }<a name="line.287"></a>
<FONT color="green">288</FONT>    <a name="line.288"></a>
<FONT color="green">289</FONT>        /**<a name="line.289"></a>
<FONT color="green">290</FONT>         * Returns a flag whether an enhanced reload check must be performed.<a name="line.290"></a>
<FONT color="green">291</FONT>         *<a name="line.291"></a>
<FONT color="green">292</FONT>         * @return the force reload check flag<a name="line.292"></a>
<FONT color="green">293</FONT>         * @since 1.4<a name="line.293"></a>
<FONT color="green">294</FONT>         */<a name="line.294"></a>
<FONT color="green">295</FONT>        public boolean isForceReloadCheck()<a name="line.295"></a>
<FONT color="green">296</FONT>        {<a name="line.296"></a>
<FONT color="green">297</FONT>            return forceReloadCheck;<a name="line.297"></a>
<FONT color="green">298</FONT>        }<a name="line.298"></a>
<FONT color="green">299</FONT>    <a name="line.299"></a>
<FONT color="green">300</FONT>        /**<a name="line.300"></a>
<FONT color="green">301</FONT>         * Sets the force reload check flag. If this flag is set, each property<a name="line.301"></a>
<FONT color="green">302</FONT>         * access on this configuration will cause a reload check on the contained<a name="line.302"></a>
<FONT color="green">303</FONT>         * configurations. This is a workaround for a problem with some reload<a name="line.303"></a>
<FONT color="green">304</FONT>         * implementations that only check if a reload is required when they are<a name="line.304"></a>
<FONT color="green">305</FONT>         * triggered. Per default this mode is disabled. If the force reload check<a name="line.305"></a>
<FONT color="green">306</FONT>         * flag is set to &lt;b&gt;true&lt;/b&gt;, accessing properties will be less<a name="line.306"></a>
<FONT color="green">307</FONT>         * efficient, but reloads on contained configurations will be detected.<a name="line.307"></a>
<FONT color="green">308</FONT>         *<a name="line.308"></a>
<FONT color="green">309</FONT>         * @param forceReloadCheck the value of the flag<a name="line.309"></a>
<FONT color="green">310</FONT>         * @since 1.4<a name="line.310"></a>
<FONT color="green">311</FONT>         */<a name="line.311"></a>
<FONT color="green">312</FONT>        public void setForceReloadCheck(boolean forceReloadCheck)<a name="line.312"></a>
<FONT color="green">313</FONT>        {<a name="line.313"></a>
<FONT color="green">314</FONT>            this.forceReloadCheck = forceReloadCheck;<a name="line.314"></a>
<FONT color="green">315</FONT>        }<a name="line.315"></a>
<FONT color="green">316</FONT>    <a name="line.316"></a>
<FONT color="green">317</FONT>        /**<a name="line.317"></a>
<FONT color="green">318</FONT>         * Returns the {@code ExpressionEngine} for converting flat child<a name="line.318"></a>
<FONT color="green">319</FONT>         * configurations to hierarchical ones.<a name="line.319"></a>
<FONT color="green">320</FONT>         *<a name="line.320"></a>
<FONT color="green">321</FONT>         * @return the conversion expression engine<a name="line.321"></a>
<FONT color="green">322</FONT>         * @since 1.6<a name="line.322"></a>
<FONT color="green">323</FONT>         */<a name="line.323"></a>
<FONT color="green">324</FONT>        public ExpressionEngine getConversionExpressionEngine()<a name="line.324"></a>
<FONT color="green">325</FONT>        {<a name="line.325"></a>
<FONT color="green">326</FONT>            return conversionExpressionEngine;<a name="line.326"></a>
<FONT color="green">327</FONT>        }<a name="line.327"></a>
<FONT color="green">328</FONT>    <a name="line.328"></a>
<FONT color="green">329</FONT>        /**<a name="line.329"></a>
<FONT color="green">330</FONT>         * Sets the {@code ExpressionEngine} for converting flat child<a name="line.330"></a>
<FONT color="green">331</FONT>         * configurations to hierarchical ones. When constructing the root node for<a name="line.331"></a>
<FONT color="green">332</FONT>         * this combined configuration the properties of all child configurations<a name="line.332"></a>
<FONT color="green">333</FONT>         * must be combined to a single hierarchical node structure. In this<a name="line.333"></a>
<FONT color="green">334</FONT>         * process, non hierarchical configurations are converted to hierarchical<a name="line.334"></a>
<FONT color="green">335</FONT>         * ones first. This can be problematic if a child configuration contains<a name="line.335"></a>
<FONT color="green">336</FONT>         * keys that are no compatible with the default expression engine used by<a name="line.336"></a>
<FONT color="green">337</FONT>         * hierarchical configurations. Therefore it is possible to specify a<a name="line.337"></a>
<FONT color="green">338</FONT>         * specific expression engine to be used for this purpose.<a name="line.338"></a>
<FONT color="green">339</FONT>         *<a name="line.339"></a>
<FONT color="green">340</FONT>         * @param conversionExpressionEngine the conversion expression engine<a name="line.340"></a>
<FONT color="green">341</FONT>         * @see ConfigurationUtils#convertToHierarchical(Configuration, ExpressionEngine)<a name="line.341"></a>
<FONT color="green">342</FONT>         * @since 1.6<a name="line.342"></a>
<FONT color="green">343</FONT>         */<a name="line.343"></a>
<FONT color="green">344</FONT>        public void setConversionExpressionEngine(<a name="line.344"></a>
<FONT color="green">345</FONT>                ExpressionEngine conversionExpressionEngine)<a name="line.345"></a>
<FONT color="green">346</FONT>        {<a name="line.346"></a>
<FONT color="green">347</FONT>            this.conversionExpressionEngine = conversionExpressionEngine;<a name="line.347"></a>
<FONT color="green">348</FONT>        }<a name="line.348"></a>
<FONT color="green">349</FONT>    <a name="line.349"></a>
<FONT color="green">350</FONT>        /**<a name="line.350"></a>
<FONT color="green">351</FONT>         * Retrieves the value of the ignoreReloadExceptions flag.<a name="line.351"></a>
<FONT color="green">352</FONT>         * @return true if exceptions are ignored, false otherwise.<a name="line.352"></a>
<FONT color="green">353</FONT>         */<a name="line.353"></a>
<FONT color="green">354</FONT>        public boolean isIgnoreReloadExceptions()<a name="line.354"></a>
<FONT color="green">355</FONT>        {<a name="line.355"></a>
<FONT color="green">356</FONT>            return ignoreReloadExceptions;<a name="line.356"></a>
<FONT color="green">357</FONT>        }<a name="line.357"></a>
<FONT color="green">358</FONT>    <a name="line.358"></a>
<FONT color="green">359</FONT>        /**<a name="line.359"></a>
<FONT color="green">360</FONT>         * If set to true then exceptions that occur during reloading will be<a name="line.360"></a>
<FONT color="green">361</FONT>         * ignored. If false then the exceptions will be allowed to be thrown<a name="line.361"></a>
<FONT color="green">362</FONT>         * back to the caller.<a name="line.362"></a>
<FONT color="green">363</FONT>         * @param ignoreReloadExceptions true if exceptions should be ignored.<a name="line.363"></a>
<FONT color="green">364</FONT>         */<a name="line.364"></a>
<FONT color="green">365</FONT>        public void setIgnoreReloadExceptions(boolean ignoreReloadExceptions)<a name="line.365"></a>
<FONT color="green">366</FONT>        {<a name="line.366"></a>
<FONT color="green">367</FONT>            this.ignoreReloadExceptions = ignoreReloadExceptions;<a name="line.367"></a>
<FONT color="green">368</FONT>        }<a name="line.368"></a>
<FONT color="green">369</FONT>    <a name="line.369"></a>
<FONT color="green">370</FONT>        /**<a name="line.370"></a>
<FONT color="green">371</FONT>         * Adds a new configuration to this combined configuration. It is possible<a name="line.371"></a>
<FONT color="green">372</FONT>         * (but not mandatory) to give the new configuration a name. This name must<a name="line.372"></a>
<FONT color="green">373</FONT>         * be unique, otherwise a {@code ConfigurationRuntimeException} will<a name="line.373"></a>
<FONT color="green">374</FONT>         * be thrown. With the optional {@code at} argument you can specify<a name="line.374"></a>
<FONT color="green">375</FONT>         * where in the resulting node structure the content of the added<a name="line.375"></a>
<FONT color="green">376</FONT>         * configuration should appear. This is a string that uses dots as property<a name="line.376"></a>
<FONT color="green">377</FONT>         * delimiters (independent on the current expression engine). For instance<a name="line.377"></a>
<FONT color="green">378</FONT>         * if you pass in the string {@code "database.tables"},<a name="line.378"></a>
<FONT color="green">379</FONT>         * all properties of the added configuration will occur in this branch.<a name="line.379"></a>
<FONT color="green">380</FONT>         *<a name="line.380"></a>
<FONT color="green">381</FONT>         * @param config the configuration to add (must not be &lt;b&gt;null&lt;/b&gt;)<a name="line.381"></a>
<FONT color="green">382</FONT>         * @param name the name of this configuration (can be &lt;b&gt;null&lt;/b&gt;)<a name="line.382"></a>
<FONT color="green">383</FONT>         * @param at the position of this configuration in the combined tree (can be<a name="line.383"></a>
<FONT color="green">384</FONT>         * &lt;b&gt;null&lt;/b&gt;)<a name="line.384"></a>
<FONT color="green">385</FONT>         */<a name="line.385"></a>
<FONT color="green">386</FONT>        public void addConfiguration(AbstractConfiguration config, String name,<a name="line.386"></a>
<FONT color="green">387</FONT>                String at)<a name="line.387"></a>
<FONT color="green">388</FONT>        {<a name="line.388"></a>
<FONT color="green">389</FONT>            if (config == null)<a name="line.389"></a>
<FONT color="green">390</FONT>            {<a name="line.390"></a>
<FONT color="green">391</FONT>                throw new IllegalArgumentException(<a name="line.391"></a>
<FONT color="green">392</FONT>                        "Added configuration must not be null!");<a name="line.392"></a>
<FONT color="green">393</FONT>            }<a name="line.393"></a>
<FONT color="green">394</FONT>            if (name != null &amp;&amp; namedConfigurations.containsKey(name))<a name="line.394"></a>
<FONT color="green">395</FONT>            {<a name="line.395"></a>
<FONT color="green">396</FONT>                throw new ConfigurationRuntimeException(<a name="line.396"></a>
<FONT color="green">397</FONT>                        "A configuration with the name '"<a name="line.397"></a>
<FONT color="green">398</FONT>                                + name<a name="line.398"></a>
<FONT color="green">399</FONT>                                + "' already exists in this combined configuration!");<a name="line.399"></a>
<FONT color="green">400</FONT>            }<a name="line.400"></a>
<FONT color="green">401</FONT>    <a name="line.401"></a>
<FONT color="green">402</FONT>            ConfigData cd = new ConfigData(config, name, at);<a name="line.402"></a>
<FONT color="green">403</FONT>            if (getLogger().isDebugEnabled())<a name="line.403"></a>
<FONT color="green">404</FONT>            {<a name="line.404"></a>
<FONT color="green">405</FONT>                getLogger().debug("Adding configuration " + config + " with name " + name);<a name="line.405"></a>
<FONT color="green">406</FONT>            }<a name="line.406"></a>
<FONT color="green">407</FONT>            configurations.add(cd);<a name="line.407"></a>
<FONT color="green">408</FONT>            if (name != null)<a name="line.408"></a>
<FONT color="green">409</FONT>            {<a name="line.409"></a>
<FONT color="green">410</FONT>                namedConfigurations.put(name, config);<a name="line.410"></a>
<FONT color="green">411</FONT>            }<a name="line.411"></a>
<FONT color="green">412</FONT>    <a name="line.412"></a>
<FONT color="green">413</FONT>            config.addConfigurationListener(this);<a name="line.413"></a>
<FONT color="green">414</FONT>            invalidate();<a name="line.414"></a>
<FONT color="green">415</FONT>        }<a name="line.415"></a>
<FONT color="green">416</FONT>    <a name="line.416"></a>
<FONT color="green">417</FONT>        /**<a name="line.417"></a>
<FONT color="green">418</FONT>         * Adds a new configuration to this combined configuration with an optional<a name="line.418"></a>
<FONT color="green">419</FONT>         * name. The new configuration's properties will be added under the root of<a name="line.419"></a>
<FONT color="green">420</FONT>         * the combined node structure.<a name="line.420"></a>
<FONT color="green">421</FONT>         *<a name="line.421"></a>
<FONT color="green">422</FONT>         * @param config the configuration to add (must not be &lt;b&gt;null&lt;/b&gt;)<a name="line.422"></a>
<FONT color="green">423</FONT>         * @param name the name of this configuration (can be &lt;b&gt;null&lt;/b&gt;)<a name="line.423"></a>
<FONT color="green">424</FONT>         */<a name="line.424"></a>
<FONT color="green">425</FONT>        public void addConfiguration(AbstractConfiguration config, String name)<a name="line.425"></a>
<FONT color="green">426</FONT>        {<a name="line.426"></a>
<FONT color="green">427</FONT>            addConfiguration(config, name, null);<a name="line.427"></a>
<FONT color="green">428</FONT>        }<a name="line.428"></a>
<FONT color="green">429</FONT>    <a name="line.429"></a>
<FONT color="green">430</FONT>        /**<a name="line.430"></a>
<FONT color="green">431</FONT>         * Adds a new configuration to this combined configuration. The new<a name="line.431"></a>
<FONT color="green">432</FONT>         * configuration is not given a name. Its properties will be added under the<a name="line.432"></a>
<FONT color="green">433</FONT>         * root of the combined node structure.<a name="line.433"></a>
<FONT color="green">434</FONT>         *<a name="line.434"></a>
<FONT color="green">435</FONT>         * @param config the configuration to add (must not be &lt;b&gt;null&lt;/b&gt;)<a name="line.435"></a>
<FONT color="green">436</FONT>         */<a name="line.436"></a>
<FONT color="green">437</FONT>        public void addConfiguration(AbstractConfiguration config)<a name="line.437"></a>
<FONT color="green">438</FONT>        {<a name="line.438"></a>
<FONT color="green">439</FONT>            addConfiguration(config, null, null);<a name="line.439"></a>
<FONT color="green">440</FONT>        }<a name="line.440"></a>
<FONT color="green">441</FONT>    <a name="line.441"></a>
<FONT color="green">442</FONT>        /**<a name="line.442"></a>
<FONT color="green">443</FONT>         * Returns the number of configurations that are contained in this combined<a name="line.443"></a>
<FONT color="green">444</FONT>         * configuration.<a name="line.444"></a>
<FONT color="green">445</FONT>         *<a name="line.445"></a>
<FONT color="green">446</FONT>         * @return the number of contained configurations<a name="line.446"></a>
<FONT color="green">447</FONT>         */<a name="line.447"></a>
<FONT color="green">448</FONT>        public int getNumberOfConfigurations()<a name="line.448"></a>
<FONT color="green">449</FONT>        {<a name="line.449"></a>
<FONT color="green">450</FONT>            return configurations.size();<a name="line.450"></a>
<FONT color="green">451</FONT>        }<a name="line.451"></a>
<FONT color="green">452</FONT>    <a name="line.452"></a>
<FONT color="green">453</FONT>        /**<a name="line.453"></a>
<FONT color="green">454</FONT>         * Returns the configuration at the specified index. The contained<a name="line.454"></a>
<FONT color="green">455</FONT>         * configurations are numbered in the order they were added to this combined<a name="line.455"></a>
<FONT color="green">456</FONT>         * configuration. The index of the first configuration is 0.<a name="line.456"></a>
<FONT color="green">457</FONT>         *<a name="line.457"></a>
<FONT color="green">458</FONT>         * @param index the index<a name="line.458"></a>
<FONT color="green">459</FONT>         * @return the configuration at this index<a name="line.459"></a>
<FONT color="green">460</FONT>         */<a name="line.460"></a>
<FONT color="green">461</FONT>        public Configuration getConfiguration(int index)<a name="line.461"></a>
<FONT color="green">462</FONT>        {<a name="line.462"></a>
<FONT color="green">463</FONT>            ConfigData cd = configurations.get(index);<a name="line.463"></a>
<FONT color="green">464</FONT>            return cd.getConfiguration();<a name="line.464"></a>
<FONT color="green">465</FONT>        }<a name="line.465"></a>
<FONT color="green">466</FONT>    <a name="line.466"></a>
<FONT color="green">467</FONT>        /**<a name="line.467"></a>
<FONT color="green">468</FONT>         * Returns the configuration with the given name. This can be &lt;b&gt;null&lt;/b&gt;<a name="line.468"></a>
<FONT color="green">469</FONT>         * if no such configuration exists.<a name="line.469"></a>
<FONT color="green">470</FONT>         *<a name="line.470"></a>
<FONT color="green">471</FONT>         * @param name the name of the configuration<a name="line.471"></a>
<FONT color="green">472</FONT>         * @return the configuration with this name<a name="line.472"></a>
<FONT color="green">473</FONT>         */<a name="line.473"></a>
<FONT color="green">474</FONT>        public Configuration getConfiguration(String name)<a name="line.474"></a>
<FONT color="green">475</FONT>        {<a name="line.475"></a>
<FONT color="green">476</FONT>            return namedConfigurations.get(name);<a name="line.476"></a>
<FONT color="green">477</FONT>        }<a name="line.477"></a>
<FONT color="green">478</FONT>    <a name="line.478"></a>
<FONT color="green">479</FONT>        /**<a name="line.479"></a>
<FONT color="green">480</FONT>         * Returns a List of all the configurations that have been added.<a name="line.480"></a>
<FONT color="green">481</FONT>         * @return A List of all the configurations.<a name="line.481"></a>
<FONT color="green">482</FONT>         * @since 1.7<a name="line.482"></a>
<FONT color="green">483</FONT>         */<a name="line.483"></a>
<FONT color="green">484</FONT>        public List&lt;AbstractConfiguration&gt; getConfigurations()<a name="line.484"></a>
<FONT color="green">485</FONT>        {<a name="line.485"></a>
<FONT color="green">486</FONT>            List&lt;AbstractConfiguration&gt; list = new ArrayList&lt;AbstractConfiguration&gt;(configurations.size());<a name="line.486"></a>
<FONT color="green">487</FONT>            for (ConfigData cd : configurations)<a name="line.487"></a>
<FONT color="green">488</FONT>            {<a name="line.488"></a>
<FONT color="green">489</FONT>                list.add(cd.getConfiguration());<a name="line.489"></a>
<FONT color="green">490</FONT>            }<a name="line.490"></a>
<FONT color="green">491</FONT>            return list;<a name="line.491"></a>
<FONT color="green">492</FONT>        }<a name="line.492"></a>
<FONT color="green">493</FONT>    <a name="line.493"></a>
<FONT color="green">494</FONT>        /**<a name="line.494"></a>
<FONT color="green">495</FONT>         * Returns a List of the names of all the configurations that have been<a name="line.495"></a>
<FONT color="green">496</FONT>         * added in the order they were added. A NULL value will be present in<a name="line.496"></a>
<FONT color="green">497</FONT>         * the list for each configuration that was added without a name.<a name="line.497"></a>
<FONT color="green">498</FONT>         * @return A List of all the configuration names.<a name="line.498"></a>
<FONT color="green">499</FONT>         * @since 1.7<a name="line.499"></a>
<FONT color="green">500</FONT>         */<a name="line.500"></a>
<FONT color="green">501</FONT>        public List&lt;String&gt; getConfigurationNameList()<a name="line.501"></a>
<FONT color="green">502</FONT>        {<a name="line.502"></a>
<FONT color="green">503</FONT>            List&lt;String&gt; list = new ArrayList&lt;String&gt;(configurations.size());<a name="line.503"></a>
<FONT color="green">504</FONT>            for (ConfigData cd : configurations)<a name="line.504"></a>
<FONT color="green">505</FONT>            {<a name="line.505"></a>
<FONT color="green">506</FONT>                list.add(cd.getName());<a name="line.506"></a>
<FONT color="green">507</FONT>            }<a name="line.507"></a>
<FONT color="green">508</FONT>            return list;<a name="line.508"></a>
<FONT color="green">509</FONT>        }<a name="line.509"></a>
<FONT color="green">510</FONT>    <a name="line.510"></a>
<FONT color="green">511</FONT>        /**<a name="line.511"></a>
<FONT color="green">512</FONT>         * Removes the specified configuration from this combined configuration.<a name="line.512"></a>
<FONT color="green">513</FONT>         *<a name="line.513"></a>
<FONT color="green">514</FONT>         * @param config the configuration to be removed<a name="line.514"></a>
<FONT color="green">515</FONT>         * @return a flag whether this configuration was found and could be removed<a name="line.515"></a>
<FONT color="green">516</FONT>         */<a name="line.516"></a>
<FONT color="green">517</FONT>        public boolean removeConfiguration(Configuration config)<a name="line.517"></a>
<FONT color="green">518</FONT>        {<a name="line.518"></a>
<FONT color="green">519</FONT>            for (int index = 0; index &lt; getNumberOfConfigurations(); index++)<a name="line.519"></a>
<FONT color="green">520</FONT>            {<a name="line.520"></a>
<FONT color="green">521</FONT>                if (configurations.get(index).getConfiguration() == config)<a name="line.521"></a>
<FONT color="green">522</FONT>                {<a name="line.522"></a>
<FONT color="green">523</FONT>                    removeConfigurationAt(index);<a name="line.523"></a>
<FONT color="green">524</FONT>                    return true;<a name="line.524"></a>
<FONT color="green">525</FONT>                }<a name="line.525"></a>
<FONT color="green">526</FONT>            }<a name="line.526"></a>
<FONT color="green">527</FONT>    <a name="line.527"></a>
<FONT color="green">528</FONT>            return false;<a name="line.528"></a>
<FONT color="green">529</FONT>        }<a name="line.529"></a>
<FONT color="green">530</FONT>    <a name="line.530"></a>
<FONT color="green">531</FONT>        /**<a name="line.531"></a>
<FONT color="green">532</FONT>         * Removes the configuration at the specified index.<a name="line.532"></a>
<FONT color="green">533</FONT>         *<a name="line.533"></a>
<FONT color="green">534</FONT>         * @param index the index<a name="line.534"></a>
<FONT color="green">535</FONT>         * @return the removed configuration<a name="line.535"></a>
<FONT color="green">536</FONT>         */<a name="line.536"></a>
<FONT color="green">537</FONT>        public Configuration removeConfigurationAt(int index)<a name="line.537"></a>
<FONT color="green">538</FONT>        {<a name="line.538"></a>
<FONT color="green">539</FONT>            ConfigData cd = configurations.remove(index);<a name="line.539"></a>
<FONT color="green">540</FONT>            if (cd.getName() != null)<a name="line.540"></a>
<FONT color="green">541</FONT>            {<a name="line.541"></a>
<FONT color="green">542</FONT>                namedConfigurations.remove(cd.getName());<a name="line.542"></a>
<FONT color="green">543</FONT>            }<a name="line.543"></a>
<FONT color="green">544</FONT>            cd.getConfiguration().removeConfigurationListener(this);<a name="line.544"></a>
<FONT color="green">545</FONT>            invalidate();<a name="line.545"></a>
<FONT color="green">546</FONT>            return cd.getConfiguration();<a name="line.546"></a>
<FONT color="green">547</FONT>        }<a name="line.547"></a>
<FONT color="green">548</FONT>    <a name="line.548"></a>
<FONT color="green">549</FONT>        /**<a name="line.549"></a>
<FONT color="green">550</FONT>         * Removes the configuration with the specified name.<a name="line.550"></a>
<FONT color="green">551</FONT>         *<a name="line.551"></a>
<FONT color="green">552</FONT>         * @param name the name of the configuration to be removed<a name="line.552"></a>
<FONT color="green">553</FONT>         * @return the removed configuration (&lt;b&gt;null&lt;/b&gt; if this configuration<a name="line.553"></a>
<FONT color="green">554</FONT>         * was not found)<a name="line.554"></a>
<FONT color="green">555</FONT>         */<a name="line.555"></a>
<FONT color="green">556</FONT>        public Configuration removeConfiguration(String name)<a name="line.556"></a>
<FONT color="green">557</FONT>        {<a name="line.557"></a>
<FONT color="green">558</FONT>            Configuration conf = getConfiguration(name);<a name="line.558"></a>
<FONT color="green">559</FONT>            if (conf != null)<a name="line.559"></a>
<FONT color="green">560</FONT>            {<a name="line.560"></a>
<FONT color="green">561</FONT>                removeConfiguration(conf);<a name="line.561"></a>
<FONT color="green">562</FONT>            }<a name="line.562"></a>
<FONT color="green">563</FONT>            return conf;<a name="line.563"></a>
<FONT color="green">564</FONT>        }<a name="line.564"></a>
<FONT color="green">565</FONT>    <a name="line.565"></a>
<FONT color="green">566</FONT>        /**<a name="line.566"></a>
<FONT color="green">567</FONT>         * Returns a set with the names of all configurations contained in this<a name="line.567"></a>
<FONT color="green">568</FONT>         * combined configuration. Of course here are only these configurations<a name="line.568"></a>
<FONT color="green">569</FONT>         * listed, for which a name was specified when they were added.<a name="line.569"></a>
<FONT color="green">570</FONT>         *<a name="line.570"></a>
<FONT color="green">571</FONT>         * @return a set with the names of the contained configurations (never<a name="line.571"></a>
<FONT color="green">572</FONT>         * &lt;b&gt;null&lt;/b&gt;)<a name="line.572"></a>
<FONT color="green">573</FONT>         */<a name="line.573"></a>
<FONT color="green">574</FONT>        public Set&lt;String&gt; getConfigurationNames()<a name="line.574"></a>
<FONT color="green">575</FONT>        {<a name="line.575"></a>
<FONT color="green">576</FONT>            return namedConfigurations.keySet();<a name="line.576"></a>
<FONT color="green">577</FONT>        }<a name="line.577"></a>
<FONT color="green">578</FONT>    <a name="line.578"></a>
<FONT color="green">579</FONT>        /**<a name="line.579"></a>
<FONT color="green">580</FONT>         * Invalidates this combined configuration. This means that the next time a<a name="line.580"></a>
<FONT color="green">581</FONT>         * property is accessed the combined node structure must be re-constructed.<a name="line.581"></a>
<FONT color="green">582</FONT>         * Invalidation of a combined configuration also means that an event of type<a name="line.582"></a>
<FONT color="green">583</FONT>         * {@code EVENT_COMBINED_INVALIDATE} is fired. Note that while other<a name="line.583"></a>
<FONT color="green">584</FONT>         * events most times appear twice (once before and once after an update),<a name="line.584"></a>
<FONT color="green">585</FONT>         * this event is only fired once (after update).<a name="line.585"></a>
<FONT color="green">586</FONT>         */<a name="line.586"></a>
<FONT color="green">587</FONT>        public void invalidate()<a name="line.587"></a>
<FONT color="green">588</FONT>        {<a name="line.588"></a>
<FONT color="green">589</FONT>            reloadRequired = true;<a name="line.589"></a>
<FONT color="green">590</FONT>            fireEvent(EVENT_COMBINED_INVALIDATE, null, null, false);<a name="line.590"></a>
<FONT color="green">591</FONT>        }<a name="line.591"></a>
<FONT color="green">592</FONT>    <a name="line.592"></a>
<FONT color="green">593</FONT>        /**<a name="line.593"></a>
<FONT color="green">594</FONT>         * Event listener call back for configuration update events. This method is<a name="line.594"></a>
<FONT color="green">595</FONT>         * called whenever one of the contained configurations was modified. It<a name="line.595"></a>
<FONT color="green">596</FONT>         * invalidates this combined configuration.<a name="line.596"></a>
<FONT color="green">597</FONT>         *<a name="line.597"></a>
<FONT color="green">598</FONT>         * @param event the update event<a name="line.598"></a>
<FONT color="green">599</FONT>         */<a name="line.599"></a>
<FONT color="green">600</FONT>        public void configurationChanged(ConfigurationEvent event)<a name="line.600"></a>
<FONT color="green">601</FONT>        {<a name="line.601"></a>
<FONT color="green">602</FONT>            if (event.getType() == AbstractFileConfiguration.EVENT_CONFIG_CHANGED)<a name="line.602"></a>
<FONT color="green">603</FONT>            {<a name="line.603"></a>
<FONT color="green">604</FONT>                fireEvent(event.getType(), event.getPropertyName(), event.getPropertyValue(), event.isBeforeUpdate());<a name="line.604"></a>
<FONT color="green">605</FONT>            }<a name="line.605"></a>
<FONT color="green">606</FONT>            else if (!event.isBeforeUpdate())<a name="line.606"></a>
<FONT color="green">607</FONT>            {<a name="line.607"></a>
<FONT color="green">608</FONT>                invalidate();<a name="line.608"></a>
<FONT color="green">609</FONT>            }<a name="line.609"></a>
<FONT color="green">610</FONT>        }<a name="line.610"></a>
<FONT color="green">611</FONT>    <a name="line.611"></a>
<FONT color="green">612</FONT>        /**<a name="line.612"></a>
<FONT color="green">613</FONT>         * Returns the configuration root node of this combined configuration. This<a name="line.613"></a>
<FONT color="green">614</FONT>         * method will construct a combined node structure using the current node<a name="line.614"></a>
<FONT color="green">615</FONT>         * combiner if necessary.<a name="line.615"></a>
<FONT color="green">616</FONT>         *<a name="line.616"></a>
<FONT color="green">617</FONT>         * @return the combined root node<a name="line.617"></a>
<FONT color="green">618</FONT>         */<a name="line.618"></a>
<FONT color="green">619</FONT>        @Override<a name="line.619"></a>
<FONT color="green">620</FONT>        public ConfigurationNode getRootNode()<a name="line.620"></a>
<FONT color="green">621</FONT>        {<a name="line.621"></a>
<FONT color="green">622</FONT>            synchronized (getReloadLock())<a name="line.622"></a>
<FONT color="green">623</FONT>            {<a name="line.623"></a>
<FONT color="green">624</FONT>                if (reloadRequired || combinedRoot == null)<a name="line.624"></a>
<FONT color="green">625</FONT>                {<a name="line.625"></a>
<FONT color="green">626</FONT>                    combinedRoot = constructCombinedNode();<a name="line.626"></a>
<FONT color="green">627</FONT>                    reloadRequired = false;<a name="line.627"></a>
<FONT color="green">628</FONT>                }<a name="line.628"></a>
<FONT color="green">629</FONT>                return combinedRoot;<a name="line.629"></a>
<FONT color="green">630</FONT>            }<a name="line.630"></a>
<FONT color="green">631</FONT>        }<a name="line.631"></a>
<FONT color="green">632</FONT>    <a name="line.632"></a>
<FONT color="green">633</FONT>        /**<a name="line.633"></a>
<FONT color="green">634</FONT>         * Clears this configuration. All contained configurations will be removed.<a name="line.634"></a>
<FONT color="green">635</FONT>         */<a name="line.635"></a>
<FONT color="green">636</FONT>        @Override<a name="line.636"></a>
<FONT color="green">637</FONT>        public void clear()<a name="line.637"></a>
<FONT color="green">638</FONT>        {<a name="line.638"></a>
<FONT color="green">639</FONT>            fireEvent(EVENT_CLEAR, null, null, true);<a name="line.639"></a>
<FONT color="green">640</FONT>            configurations = new ArrayList&lt;ConfigData&gt;();<a name="line.640"></a>
<FONT color="green">641</FONT>            namedConfigurations = new HashMap&lt;String, AbstractConfiguration&gt;();<a name="line.641"></a>
<FONT color="green">642</FONT>            fireEvent(EVENT_CLEAR, null, null, false);<a name="line.642"></a>
<FONT color="green">643</FONT>            invalidate();<a name="line.643"></a>
<FONT color="green">644</FONT>        }<a name="line.644"></a>
<FONT color="green">645</FONT>    <a name="line.645"></a>
<FONT color="green">646</FONT>        /**<a name="line.646"></a>
<FONT color="green">647</FONT>         * Returns a copy of this object. This implementation performs a deep clone,<a name="line.647"></a>
<FONT color="green">648</FONT>         * i.e. all contained configurations will be cloned, too. For this to work,<a name="line.648"></a>
<FONT color="green">649</FONT>         * all contained configurations must be cloneable. Registered event<a name="line.649"></a>
<FONT color="green">650</FONT>         * listeners won't be cloned. The clone will use the same node combiner than<a name="line.650"></a>
<FONT color="green">651</FONT>         * the original.<a name="line.651"></a>
<FONT color="green">652</FONT>         *<a name="line.652"></a>
<FONT color="green">653</FONT>         * @return the copied object<a name="line.653"></a>
<FONT color="green">654</FONT>         */<a name="line.654"></a>
<FONT color="green">655</FONT>        @Override<a name="line.655"></a>
<FONT color="green">656</FONT>        public Object clone()<a name="line.656"></a>
<FONT color="green">657</FONT>        {<a name="line.657"></a>
<FONT color="green">658</FONT>            CombinedConfiguration copy = (CombinedConfiguration) super.clone();<a name="line.658"></a>
<FONT color="green">659</FONT>            copy.clear();<a name="line.659"></a>
<FONT color="green">660</FONT>            for (ConfigData cd : configurations)<a name="line.660"></a>
<FONT color="green">661</FONT>            {<a name="line.661"></a>
<FONT color="green">662</FONT>                copy.addConfiguration((AbstractConfiguration) ConfigurationUtils<a name="line.662"></a>
<FONT color="green">663</FONT>                        .cloneConfiguration(cd.getConfiguration()), cd.getName(),<a name="line.663"></a>
<FONT color="green">664</FONT>                        cd.getAt());<a name="line.664"></a>
<FONT color="green">665</FONT>            }<a name="line.665"></a>
<FONT color="green">666</FONT>    <a name="line.666"></a>
<FONT color="green">667</FONT>            copy.setRootNode(new DefaultConfigurationNode());<a name="line.667"></a>
<FONT color="green">668</FONT>            return copy;<a name="line.668"></a>
<FONT color="green">669</FONT>        }<a name="line.669"></a>
<FONT color="green">670</FONT>    <a name="line.670"></a>
<FONT color="green">671</FONT>        /**<a name="line.671"></a>
<FONT color="green">672</FONT>         * Returns the configuration source, in which the specified key is defined.<a name="line.672"></a>
<FONT color="green">673</FONT>         * This method will determine the configuration node that is identified by<a name="line.673"></a>
<FONT color="green">674</FONT>         * the given key. The following constellations are possible:<a name="line.674"></a>
<FONT color="green">675</FONT>         * &lt;ul&gt;<a name="line.675"></a>
<FONT color="green">676</FONT>         * &lt;li&gt;If no node object is found for this key, &lt;b&gt;null&lt;/b&gt; is returned.&lt;/li&gt;<a name="line.676"></a>
<FONT color="green">677</FONT>         * &lt;li&gt;If the key maps to multiple nodes belonging to different<a name="line.677"></a>
<FONT color="green">678</FONT>         * configuration sources, a {@code IllegalArgumentException} is<a name="line.678"></a>
<FONT color="green">679</FONT>         * thrown (in this case no unique source can be determined).&lt;/li&gt;<a name="line.679"></a>
<FONT color="green">680</FONT>         * &lt;li&gt;If exactly one node is found for the key, the (child) configuration<a name="line.680"></a>
<FONT color="green">681</FONT>         * object, to which the node belongs is determined and returned.&lt;/li&gt;<a name="line.681"></a>
<FONT color="green">682</FONT>         * &lt;li&gt;For keys that have been added directly to this combined<a name="line.682"></a>
<FONT color="green">683</FONT>         * configuration and that do not belong to the namespaces defined by<a name="line.683"></a>
<FONT color="green">684</FONT>         * existing child configurations this configuration will be returned.&lt;/li&gt;<a name="line.684"></a>
<FONT color="green">685</FONT>         * &lt;/ul&gt;<a name="line.685"></a>
<FONT color="green">686</FONT>         *<a name="line.686"></a>
<FONT color="green">687</FONT>         * @param key the key of a configuration property<a name="line.687"></a>
<FONT color="green">688</FONT>         * @return the configuration, to which this property belongs or &lt;b&gt;null&lt;/b&gt;<a name="line.688"></a>
<FONT color="green">689</FONT>         * if the key cannot be resolved<a name="line.689"></a>
<FONT color="green">690</FONT>         * @throws IllegalArgumentException if the key maps to multiple properties<a name="line.690"></a>
<FONT color="green">691</FONT>         * and the source cannot be determined, or if the key is &lt;b&gt;null&lt;/b&gt;<a name="line.691"></a>
<FONT color="green">692</FONT>         * @since 1.5<a name="line.692"></a>
<FONT color="green">693</FONT>         */<a name="line.693"></a>
<FONT color="green">694</FONT>        public Configuration getSource(String key)<a name="line.694"></a>
<FONT color="green">695</FONT>        {<a name="line.695"></a>
<FONT color="green">696</FONT>            if (key == null)<a name="line.696"></a>
<FONT color="green">697</FONT>            {<a name="line.697"></a>
<FONT color="green">698</FONT>                throw new IllegalArgumentException("Key must not be null!");<a name="line.698"></a>
<FONT color="green">699</FONT>            }<a name="line.699"></a>
<FONT color="green">700</FONT>    <a name="line.700"></a>
<FONT color="green">701</FONT>            List&lt;ConfigurationNode&gt; nodes = fetchNodeList(key);<a name="line.701"></a>
<FONT color="green">702</FONT>            if (nodes.isEmpty())<a name="line.702"></a>
<FONT color="green">703</FONT>            {<a name="line.703"></a>
<FONT color="green">704</FONT>                return null;<a name="line.704"></a>
<FONT color="green">705</FONT>            }<a name="line.705"></a>
<FONT color="green">706</FONT>    <a name="line.706"></a>
<FONT color="green">707</FONT>            Iterator&lt;ConfigurationNode&gt; it = nodes.iterator();<a name="line.707"></a>
<FONT color="green">708</FONT>            Configuration source = findSourceConfiguration(it.next());<a name="line.708"></a>
<FONT color="green">709</FONT>            while (it.hasNext())<a name="line.709"></a>
<FONT color="green">710</FONT>            {<a name="line.710"></a>
<FONT color="green">711</FONT>                Configuration src = findSourceConfiguration(it.next());<a name="line.711"></a>
<FONT color="green">712</FONT>                if (src != source)<a name="line.712"></a>
<FONT color="green">713</FONT>                {<a name="line.713"></a>
<FONT color="green">714</FONT>                    throw new IllegalArgumentException("The key " + key<a name="line.714"></a>
<FONT color="green">715</FONT>                            + " is defined by multiple sources!");<a name="line.715"></a>
<FONT color="green">716</FONT>                }<a name="line.716"></a>
<FONT color="green">717</FONT>            }<a name="line.717"></a>
<FONT color="green">718</FONT>    <a name="line.718"></a>
<FONT color="green">719</FONT>            return source;<a name="line.719"></a>
<FONT color="green">720</FONT>        }<a name="line.720"></a>
<FONT color="green">721</FONT>    <a name="line.721"></a>
<FONT color="green">722</FONT>        /**<a name="line.722"></a>
<FONT color="green">723</FONT>         * Evaluates the passed in property key and returns a list with the matching<a name="line.723"></a>
<FONT color="green">724</FONT>         * configuration nodes. This implementation also evaluates the<a name="line.724"></a>
<FONT color="green">725</FONT>         * &lt;em&gt;force reload check&lt;/em&gt; flag. If it is set,<a name="line.725"></a>
<FONT color="green">726</FONT>         * {@code performReloadCheck()} is invoked.<a name="line.726"></a>
<FONT color="green">727</FONT>         *<a name="line.727"></a>
<FONT color="green">728</FONT>         * @param key the property key<a name="line.728"></a>
<FONT color="green">729</FONT>         * @return a list with the matching configuration nodes<a name="line.729"></a>
<FONT color="green">730</FONT>         */<a name="line.730"></a>
<FONT color="green">731</FONT>        @Override<a name="line.731"></a>
<FONT color="green">732</FONT>        protected List&lt;ConfigurationNode&gt; fetchNodeList(String key)<a name="line.732"></a>
<FONT color="green">733</FONT>        {<a name="line.733"></a>
<FONT color="green">734</FONT>            if (isForceReloadCheck())<a name="line.734"></a>
<FONT color="green">735</FONT>            {<a name="line.735"></a>
<FONT color="green">736</FONT>                performReloadCheck();<a name="line.736"></a>
<FONT color="green">737</FONT>            }<a name="line.737"></a>
<FONT color="green">738</FONT>    <a name="line.738"></a>
<FONT color="green">739</FONT>            return super.fetchNodeList(key);<a name="line.739"></a>
<FONT color="green">740</FONT>        }<a name="line.740"></a>
<FONT color="green">741</FONT>    <a name="line.741"></a>
<FONT color="green">742</FONT>        /**<a name="line.742"></a>
<FONT color="green">743</FONT>         * Triggers the contained configurations to perform a reload check if<a name="line.743"></a>
<FONT color="green">744</FONT>         * necessary. This method is called when a property of this combined<a name="line.744"></a>
<FONT color="green">745</FONT>         * configuration is accessed and the {@code forceReloadCheck} property<a name="line.745"></a>
<FONT color="green">746</FONT>         * is set to &lt;b&gt;true&lt;/b&gt;.<a name="line.746"></a>
<FONT color="green">747</FONT>         *<a name="line.747"></a>
<FONT color="green">748</FONT>         * @see #setForceReloadCheck(boolean)<a name="line.748"></a>
<FONT color="green">749</FONT>         * @since 1.6<a name="line.749"></a>
<FONT color="green">750</FONT>         */<a name="line.750"></a>
<FONT color="green">751</FONT>        protected void performReloadCheck()<a name="line.751"></a>
<FONT color="green">752</FONT>        {<a name="line.752"></a>
<FONT color="green">753</FONT>            for (ConfigData cd : configurations)<a name="line.753"></a>
<FONT color="green">754</FONT>            {<a name="line.754"></a>
<FONT color="green">755</FONT>                try<a name="line.755"></a>
<FONT color="green">756</FONT>                {<a name="line.756"></a>
<FONT color="green">757</FONT>                    // simply retrieve a property; this is enough for<a name="line.757"></a>
<FONT color="green">758</FONT>                    // triggering a reload<a name="line.758"></a>
<FONT color="green">759</FONT>                    cd.getConfiguration().getProperty(PROP_RELOAD_CHECK);<a name="line.759"></a>
<FONT color="green">760</FONT>                }<a name="line.760"></a>
<FONT color="green">761</FONT>                catch (Exception ex)<a name="line.761"></a>
<FONT color="green">762</FONT>                {<a name="line.762"></a>
<FONT color="green">763</FONT>                    if (!ignoreReloadExceptions)<a name="line.763"></a>
<FONT color="green">764</FONT>                    {<a name="line.764"></a>
<FONT color="green">765</FONT>                        throw new ConfigurationRuntimeException(ex);<a name="line.765"></a>
<FONT color="green">766</FONT>                    }<a name="line.766"></a>
<FONT color="green">767</FONT>                }<a name="line.767"></a>
<FONT color="green">768</FONT>            }<a name="line.768"></a>
<FONT color="green">769</FONT>        }<a name="line.769"></a>
<FONT color="green">770</FONT>    <a name="line.770"></a>
<FONT color="green">771</FONT>        /**<a name="line.771"></a>
<FONT color="green">772</FONT>         * Creates the root node of this combined configuration.<a name="line.772"></a>
<FONT color="green">773</FONT>         *<a name="line.773"></a>
<FONT color="green">774</FONT>         * @return the combined root node<a name="line.774"></a>
<FONT color="green">775</FONT>         */<a name="line.775"></a>
<FONT color="green">776</FONT>        private ConfigurationNode constructCombinedNode()<a name="line.776"></a>
<FONT color="green">777</FONT>        {<a name="line.777"></a>
<FONT color="green">778</FONT>            if (getNumberOfConfigurations() &lt; 1)<a name="line.778"></a>
<FONT color="green">779</FONT>            {<a name="line.779"></a>
<FONT color="green">780</FONT>                if (getLogger().isDebugEnabled())<a name="line.780"></a>
<FONT color="green">781</FONT>                {<a name="line.781"></a>
<FONT color="green">782</FONT>                    getLogger().debug("No configurations defined for " + this);<a name="line.782"></a>
<FONT color="green">783</FONT>                }<a name="line.783"></a>
<FONT color="green">784</FONT>                return new ViewNode();<a name="line.784"></a>
<FONT color="green">785</FONT>            }<a name="line.785"></a>
<FONT color="green">786</FONT>    <a name="line.786"></a>
<FONT color="green">787</FONT>            else<a name="line.787"></a>
<FONT color="green">788</FONT>            {<a name="line.788"></a>
<FONT color="green">789</FONT>                Iterator&lt;ConfigData&gt; it = configurations.iterator();<a name="line.789"></a>
<FONT color="green">790</FONT>                ConfigurationNode node = it.next().getTransformedRoot();<a name="line.790"></a>
<FONT color="green">791</FONT>                while (it.hasNext())<a name="line.791"></a>
<FONT color="green">792</FONT>                {<a name="line.792"></a>
<FONT color="green">793</FONT>                    node = getNodeCombiner().combine(node,<a name="line.793"></a>
<FONT color="green">794</FONT>                            it.next().getTransformedRoot());<a name="line.794"></a>
<FONT color="green">795</FONT>                }<a name="line.795"></a>
<FONT color="green">796</FONT>                if (getLogger().isDebugEnabled())<a name="line.796"></a>
<FONT color="green">797</FONT>                {<a name="line.797"></a>
<FONT color="green">798</FONT>                    ByteArrayOutputStream os = new ByteArrayOutputStream();<a name="line.798"></a>
<FONT color="green">799</FONT>                    PrintStream stream = new PrintStream(os);<a name="line.799"></a>
<FONT color="green">800</FONT>                    TreeUtils.printTree(stream, node);<a name="line.800"></a>
<FONT color="green">801</FONT>                    getLogger().debug(os.toString());<a name="line.801"></a>
<FONT color="green">802</FONT>                }<a name="line.802"></a>
<FONT color="green">803</FONT>                return node;<a name="line.803"></a>
<FONT color="green">804</FONT>            }<a name="line.804"></a>
<FONT color="green">805</FONT>        }<a name="line.805"></a>
<FONT color="green">806</FONT>    <a name="line.806"></a>
<FONT color="green">807</FONT>        /**<a name="line.807"></a>
<FONT color="green">808</FONT>         * Determines the configuration that owns the specified node.<a name="line.808"></a>
<FONT color="green">809</FONT>         *<a name="line.809"></a>
<FONT color="green">810</FONT>         * @param node the node<a name="line.810"></a>
<FONT color="green">811</FONT>         * @return the owning configuration<a name="line.811"></a>
<FONT color="green">812</FONT>         */<a name="line.812"></a>
<FONT color="green">813</FONT>        private Configuration findSourceConfiguration(ConfigurationNode node)<a name="line.813"></a>
<FONT color="green">814</FONT>        {<a name="line.814"></a>
<FONT color="green">815</FONT>            synchronized (getReloadLock())<a name="line.815"></a>
<FONT color="green">816</FONT>            {<a name="line.816"></a>
<FONT color="green">817</FONT>                ConfigurationNode root = null;<a name="line.817"></a>
<FONT color="green">818</FONT>                ConfigurationNode current = node;<a name="line.818"></a>
<FONT color="green">819</FONT>    <a name="line.819"></a>
<FONT color="green">820</FONT>                // find the root node in this hierarchy<a name="line.820"></a>
<FONT color="green">821</FONT>                while (current != null)<a name="line.821"></a>
<FONT color="green">822</FONT>                {<a name="line.822"></a>
<FONT color="green">823</FONT>                    root = current;<a name="line.823"></a>
<FONT color="green">824</FONT>                    current = current.getParentNode();<a name="line.824"></a>
<FONT color="green">825</FONT>                }<a name="line.825"></a>
<FONT color="green">826</FONT>    <a name="line.826"></a>
<FONT color="green">827</FONT>                // Check with the root nodes of the child configurations<a name="line.827"></a>
<FONT color="green">828</FONT>                for (ConfigData cd : configurations)<a name="line.828"></a>
<FONT color="green">829</FONT>                {<a name="line.829"></a>
<FONT color="green">830</FONT>                    if (root == cd.getRootNode())<a name="line.830"></a>
<FONT color="green">831</FONT>                    {<a name="line.831"></a>
<FONT color="green">832</FONT>                        return cd.getConfiguration();<a name="line.832"></a>
<FONT color="green">833</FONT>                    }<a name="line.833"></a>
<FONT color="green">834</FONT>                }<a name="line.834"></a>
<FONT color="green">835</FONT>            }<a name="line.835"></a>
<FONT color="green">836</FONT>    <a name="line.836"></a>
<FONT color="green">837</FONT>            return this;<a name="line.837"></a>
<FONT color="green">838</FONT>        }<a name="line.838"></a>
<FONT color="green">839</FONT>    <a name="line.839"></a>
<FONT color="green">840</FONT>        /**<a name="line.840"></a>
<FONT color="green">841</FONT>         * An internal helper class for storing information about contained<a name="line.841"></a>
<FONT color="green">842</FONT>         * configurations.<a name="line.842"></a>
<FONT color="green">843</FONT>         */<a name="line.843"></a>
<FONT color="green">844</FONT>        class ConfigData<a name="line.844"></a>
<FONT color="green">845</FONT>        {<a name="line.845"></a>
<FONT color="green">846</FONT>            /** Stores a reference to the configuration. */<a name="line.846"></a>
<FONT color="green">847</FONT>            private AbstractConfiguration configuration;<a name="line.847"></a>
<FONT color="green">848</FONT>    <a name="line.848"></a>
<FONT color="green">849</FONT>            /** Stores the name under which the configuration is stored. */<a name="line.849"></a>
<FONT color="green">850</FONT>            private String name;<a name="line.850"></a>
<FONT color="green">851</FONT>    <a name="line.851"></a>
<FONT color="green">852</FONT>            /** Stores the at information as path of nodes. */<a name="line.852"></a>
<FONT color="green">853</FONT>            private Collection&lt;String&gt; atPath;<a name="line.853"></a>
<FONT color="green">854</FONT>    <a name="line.854"></a>
<FONT color="green">855</FONT>            /** Stores the at string.*/<a name="line.855"></a>
<FONT color="green">856</FONT>            private String at;<a name="line.856"></a>
<FONT color="green">857</FONT>    <a name="line.857"></a>
<FONT color="green">858</FONT>            /** Stores the root node for this child configuration.*/<a name="line.858"></a>
<FONT color="green">859</FONT>            private ConfigurationNode rootNode;<a name="line.859"></a>
<FONT color="green">860</FONT>    <a name="line.860"></a>
<FONT color="green">861</FONT>            /**<a name="line.861"></a>
<FONT color="green">862</FONT>             * Creates a new instance of {@code ConfigData} and initializes<a name="line.862"></a>
<FONT color="green">863</FONT>             * it.<a name="line.863"></a>
<FONT color="green">864</FONT>             *<a name="line.864"></a>
<FONT color="green">865</FONT>             * @param config the configuration<a name="line.865"></a>
<FONT color="green">866</FONT>             * @param n the name<a name="line.866"></a>
<FONT color="green">867</FONT>             * @param at the at position<a name="line.867"></a>
<FONT color="green">868</FONT>             */<a name="line.868"></a>
<FONT color="green">869</FONT>            public ConfigData(AbstractConfiguration config, String n, String at)<a name="line.869"></a>
<FONT color="green">870</FONT>            {<a name="line.870"></a>
<FONT color="green">871</FONT>                configuration = config;<a name="line.871"></a>
<FONT color="green">872</FONT>                name = n;<a name="line.872"></a>
<FONT color="green">873</FONT>                atPath = parseAt(at);<a name="line.873"></a>
<FONT color="green">874</FONT>                this.at = at;<a name="line.874"></a>
<FONT color="green">875</FONT>            }<a name="line.875"></a>
<FONT color="green">876</FONT>    <a name="line.876"></a>
<FONT color="green">877</FONT>            /**<a name="line.877"></a>
<FONT color="green">878</FONT>             * Returns the stored configuration.<a name="line.878"></a>
<FONT color="green">879</FONT>             *<a name="line.879"></a>
<FONT color="green">880</FONT>             * @return the configuration<a name="line.880"></a>
<FONT color="green">881</FONT>             */<a name="line.881"></a>
<FONT color="green">882</FONT>            public AbstractConfiguration getConfiguration()<a name="line.882"></a>
<FONT color="green">883</FONT>            {<a name="line.883"></a>
<FONT color="green">884</FONT>                return configuration;<a name="line.884"></a>
<FONT color="green">885</FONT>            }<a name="line.885"></a>
<FONT color="green">886</FONT>    <a name="line.886"></a>
<FONT color="green">887</FONT>            /**<a name="line.887"></a>
<FONT color="green">888</FONT>             * Returns the configuration's name.<a name="line.888"></a>
<FONT color="green">889</FONT>             *<a name="line.889"></a>
<FONT color="green">890</FONT>             * @return the name<a name="line.890"></a>
<FONT color="green">891</FONT>             */<a name="line.891"></a>
<FONT color="green">892</FONT>            public String getName()<a name="line.892"></a>
<FONT color="green">893</FONT>            {<a name="line.893"></a>
<FONT color="green">894</FONT>                return name;<a name="line.894"></a>
<FONT color="green">895</FONT>            }<a name="line.895"></a>
<FONT color="green">896</FONT>    <a name="line.896"></a>
<FONT color="green">897</FONT>            /**<a name="line.897"></a>
<FONT color="green">898</FONT>             * Returns the at position of this configuration.<a name="line.898"></a>
<FONT color="green">899</FONT>             *<a name="line.899"></a>
<FONT color="green">900</FONT>             * @return the at position<a name="line.900"></a>
<FONT color="green">901</FONT>             */<a name="line.901"></a>
<FONT color="green">902</FONT>            public String getAt()<a name="line.902"></a>
<FONT color="green">903</FONT>            {<a name="line.903"></a>
<FONT color="green">904</FONT>                return at;<a name="line.904"></a>
<FONT color="green">905</FONT>            }<a name="line.905"></a>
<FONT color="green">906</FONT>    <a name="line.906"></a>
<FONT color="green">907</FONT>            /**<a name="line.907"></a>
<FONT color="green">908</FONT>             * Returns the root node for this child configuration.<a name="line.908"></a>
<FONT color="green">909</FONT>             *<a name="line.909"></a>
<FONT color="green">910</FONT>             * @return the root node of this child configuration<a name="line.910"></a>
<FONT color="green">911</FONT>             * @since 1.5<a name="line.911"></a>
<FONT color="green">912</FONT>             */<a name="line.912"></a>
<FONT color="green">913</FONT>            public ConfigurationNode getRootNode()<a name="line.913"></a>
<FONT color="green">914</FONT>            {<a name="line.914"></a>
<FONT color="green">915</FONT>                return rootNode;<a name="line.915"></a>
<FONT color="green">916</FONT>            }<a name="line.916"></a>
<FONT color="green">917</FONT>    <a name="line.917"></a>
<FONT color="green">918</FONT>            /**<a name="line.918"></a>
<FONT color="green">919</FONT>             * Returns the transformed root node of the stored configuration. The<a name="line.919"></a>
<FONT color="green">920</FONT>             * term &amp;quot;transformed&amp;quot; means that an eventually defined at path<a name="line.920"></a>
<FONT color="green">921</FONT>             * has been applied.<a name="line.921"></a>
<FONT color="green">922</FONT>             *<a name="line.922"></a>
<FONT color="green">923</FONT>             * @return the transformed root node<a name="line.923"></a>
<FONT color="green">924</FONT>             */<a name="line.924"></a>
<FONT color="green">925</FONT>            public ConfigurationNode getTransformedRoot()<a name="line.925"></a>
<FONT color="green">926</FONT>            {<a name="line.926"></a>
<FONT color="green">927</FONT>                ViewNode result = new ViewNode();<a name="line.927"></a>
<FONT color="green">928</FONT>                ViewNode atParent = result;<a name="line.928"></a>
<FONT color="green">929</FONT>    <a name="line.929"></a>
<FONT color="green">930</FONT>                if (atPath != null)<a name="line.930"></a>
<FONT color="green">931</FONT>                {<a name="line.931"></a>
<FONT color="green">932</FONT>                    // Build the complete path<a name="line.932"></a>
<FONT color="green">933</FONT>                    for (String p : atPath)<a name="line.933"></a>
<FONT color="green">934</FONT>                    {<a name="line.934"></a>
<FONT color="green">935</FONT>                        ViewNode node = new ViewNode();<a name="line.935"></a>
<FONT color="green">936</FONT>                        node.setName(p);<a name="line.936"></a>
<FONT color="green">937</FONT>                        atParent.addChild(node);<a name="line.937"></a>
<FONT color="green">938</FONT>                        atParent = node;<a name="line.938"></a>
<FONT color="green">939</FONT>                    }<a name="line.939"></a>
<FONT color="green">940</FONT>                }<a name="line.940"></a>
<FONT color="green">941</FONT>    <a name="line.941"></a>
<FONT color="green">942</FONT>                // Copy data of the root node to the new path<a name="line.942"></a>
<FONT color="green">943</FONT>                ConfigurationNode root = ConfigurationUtils<a name="line.943"></a>
<FONT color="green">944</FONT>                        .convertToHierarchical(getConfiguration(),<a name="line.944"></a>
<FONT color="green">945</FONT>                                getConversionExpressionEngine()).getRootNode();<a name="line.945"></a>
<FONT color="green">946</FONT>                atParent.appendChildren(root);<a name="line.946"></a>
<FONT color="green">947</FONT>                atParent.appendAttributes(root);<a name="line.947"></a>
<FONT color="green">948</FONT>                rootNode = root;<a name="line.948"></a>
<FONT color="green">949</FONT>    <a name="line.949"></a>
<FONT color="green">950</FONT>                return result;<a name="line.950"></a>
<FONT color="green">951</FONT>            }<a name="line.951"></a>
<FONT color="green">952</FONT>    <a name="line.952"></a>
<FONT color="green">953</FONT>            /**<a name="line.953"></a>
<FONT color="green">954</FONT>             * Splits the at path into its components.<a name="line.954"></a>
<FONT color="green">955</FONT>             *<a name="line.955"></a>
<FONT color="green">956</FONT>             * @param at the at string<a name="line.956"></a>
<FONT color="green">957</FONT>             * @return a collection with the names of the single components<a name="line.957"></a>
<FONT color="green">958</FONT>             */<a name="line.958"></a>
<FONT color="green">959</FONT>            private Collection&lt;String&gt; parseAt(String at)<a name="line.959"></a>
<FONT color="green">960</FONT>            {<a name="line.960"></a>
<FONT color="green">961</FONT>                if (at == null)<a name="line.961"></a>
<FONT color="green">962</FONT>                {<a name="line.962"></a>
<FONT color="green">963</FONT>                    return null;<a name="line.963"></a>
<FONT color="green">964</FONT>                }<a name="line.964"></a>
<FONT color="green">965</FONT>    <a name="line.965"></a>
<FONT color="green">966</FONT>                Collection&lt;String&gt; result = new ArrayList&lt;String&gt;();<a name="line.966"></a>
<FONT color="green">967</FONT>                DefaultConfigurationKey.KeyIterator it = new DefaultConfigurationKey(<a name="line.967"></a>
<FONT color="green">968</FONT>                        AT_ENGINE, at).iterator();<a name="line.968"></a>
<FONT color="green">969</FONT>                while (it.hasNext())<a name="line.969"></a>
<FONT color="green">970</FONT>                {<a name="line.970"></a>
<FONT color="green">971</FONT>                    result.add(it.nextKey());<a name="line.971"></a>
<FONT color="green">972</FONT>                }<a name="line.972"></a>
<FONT color="green">973</FONT>                return result;<a name="line.973"></a>
<FONT color="green">974</FONT>            }<a name="line.974"></a>
<FONT color="green">975</FONT>        }<a name="line.975"></a>
<FONT color="green">976</FONT>    }<a name="line.976"></a>




























































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